package com.atguigu.eduservice.controller;


import com.atguigu.commonutils.R;
import com.atguigu.eduservice.entity.EduTeacher;
import com.atguigu.eduservice.entity.vo.TeacherQuery;
import com.atguigu.eduservice.service.EduTeacherService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import java.util.List;



/**
 * <p>
 * 讲师 前端控制器
 * </p>
 *
 * @author testjava
 * @since 2020-12-04
 */
@Api(description = "讲师管理")
@RestController
@RequestMapping("/eduservice/teacher")
@CrossOrigin
public class EduTeacherController {

    //把service注入
    @Autowired
    private EduTeacherService eduTeacherService;
    //1.查询讲师表中的所有数据
    //rest风格
//    @ApiOperation(value = "所有讲师列表")
//    @GetMapping("findAll")
//    public List<EduTeacher> findAllTeacher(){
//        //调用service的方法实现查询所有的操作
//        List<EduTeacher> list = eduTeacherService.list(null);
//        return list;
//    }



    @ApiOperation(value = "所有讲师列表")
    @GetMapping("findAll")
    public R findAllTeacher(){

        List<EduTeacher> list = eduTeacherService.list(null);

        return R.ok().data("items", list);

    }






    //逻辑删除讲师的方法
//    @ApiOperation(value = "逻辑删除讲师")
//    @DeleteMapping("{id}")//id需要通过路径进行传递
//    public  boolean removeTeacher(@ApiParam(name = "id", value = "讲师ID", required = true) @PathVariable String id){//@PathVariable String id获取路径中的id值
//        boolean flag = eduTeacherService.removeById(id);
//        return flag;
//    }
    @ApiOperation(value = "根据ID删除讲师")
    @DeleteMapping("{id}")
    public R removeById(@ApiParam(name = "id", value = "讲师ID", required = true)
        @PathVariable String id){
        boolean flag = eduTeacherService.removeById(id);
        if(flag){
            return R.ok();
        }else{
            return R.error();
        }
    }

    //3 分页查询讲师的方法
    //currrnt: 当前页
    //limit: 每页的记录数
    @ApiOperation(value = "分页讲师列表")
    @GetMapping("pageTeacher/{current}/{limit}")
    public R pageListTeacher(@PathVariable long current,
                             @PathVariable long limit){


        //创建一个page对象
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);//当前页，每页的记录数

        //什么是统一的异常处理
        //方式一：全局的异常处理
        //int a=10/0;


        //方式二：特定的异常处理
        //int a=10/0;

        //方式三：自定义的异常处理
//        try {
//            int a=10/0;
//        }catch (Exception e){
//            throw new GuliException(20001,"执行了自定义的异常处理");
//        }




        //调用方法实心分页
        //调用方法的时候，底层封装，把分页所有的数据封装到pageTeacher对象里面去
        eduTeacherService.page(pageTeacher,null);

        long total = pageTeacher.getTotal();
        List<EduTeacher> records = pageTeacher.getRecords();
        //返回的方式二
//        Map map=new HashMap();
//        map.put("total",total);
//        map.put("rows",records);
//        return R.ok().data(map);

        //返回的方式一
        return R.ok().data("total",total).data("rows",records);
    }

    //4.条件查询带分页的方法
    @PostMapping("pageTeacherCondition/{current}/{limit}")
    public R pageTeacherCondition(@PathVariable long current,
                                  @PathVariable long limit,
                                   @RequestBody(required = false) TeacherQuery teacherQuery){
        //创建一个配置对象
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);//当前页，每页的记录数


        //构建条件
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();
        //多条件组合查询
        //mybatis学过  动态sql
        String name = teacherQuery.getName();
        Integer level = teacherQuery.getLevel();
        String begin = teacherQuery.getBegin();
        String end = teacherQuery.getEnd();
        //判断条件是否为空，如果不为空拼接条件
        if(!StringUtils.isEmpty(name)){
            //构建条件
            wrapper.like("name",name);//模糊查询
        }
        if (!StringUtils.isEmpty(level)){
            wrapper.eq("level",level);//等于
        }
        if (!StringUtils.isEmpty(begin)){
            wrapper.ge("gmt_create",begin);//>=
        }
        if (!StringUtils.isEmpty(end)){
            wrapper.le("gmt_create",end);//<=
        }

        //排序
        wrapper.orderByDesc("gmt_create");


        //调用方法实现条件查询分页
        eduTeacherService.page(pageTeacher,wrapper);

        long total = pageTeacher.getTotal();
        List<EduTeacher> records = pageTeacher.getRecords();
        //返回的方式一
        return R.ok().data("total",total).data("rows",records);
    }




    //添加讲师的接口方法
    @PostMapping("addTeacher")
    public R addTeacher(@RequestBody EduTeacher eduTeacher){
        boolean save = eduTeacherService.save(eduTeacher);
        if(save){
            return R.ok();
        }else{
            return R.error();
        }
    }


    //根据讲师的id进行查询
    @GetMapping("getTeacher/{id}")
    public R getTeacher(@PathVariable String id){
        EduTeacher eduTeacher= eduTeacherService.getById(id);
        return R.ok().data("teacher",eduTeacher);
    }


    //讲师修改功能
    @PostMapping("updateTeacher")
    public R updateTeacher(@RequestBody EduTeacher eduTeacher){
        boolean flag = eduTeacherService.updateById(eduTeacher);
        if(flag){
            return R.ok();
        }else{
            return R.error();
        }
    }


}

